   MySQL.

          mysql_connect()   
    .

    ,   new. 
   :

<?php
$q=@mysql_connect("localhost","user","password");
if($q==false)
{
    print "     !";
    exit;
}
else
{
    print "    !";
    mysql_close($q);
}
?>

    mysql_connect "@"      
     mysql_connect()    mysql_connect  , 
 localhost,  ,    root  ,    ,  
        mysql_connect("localhost","root","")

 mysql_close     .

      ,   , 
     :

<?php
$connect=mysql_connect("localhost","root","") or die ("<h3>Fatal Error</h3>     !");
mysql_select_db("  ");
mysql_query("insert into  ( ) values(' ')");
mysql_close($connect);
?>

       new,   user, 
  login       vasya-   :

<?php
$connect=mysql_connect("localhost","root","") or die ("<h3>Fatal Error</h3>     !");
mysql_select_db("new");
mysql_query("insert into user(login) values('vasya')");
mysql_close($connect);
?>

  phpMyAdmin,     .

     ,       vasya:

<?php
$connect=mysql_connect("localhost","root","") or die ("<h3>Fatal Error</h3>     !");
mysql_select_db("new");
mysql_query("DELETE FROM user WHERE login = ('vasya')");
mysql_close($connect);
?>

          , 
         ,     :) :

    UPDATE()    :

"UPDATE   SET  ('  ') WHERE    ('  ')"

   :

<?php
$connect=mysql_connect("localhost","root","") or die ("<h3>Fatal Error</h3>     !");
mysql_select_db("new");
mysql_query("UPDATE user SET login=('vanya') WHERE login=('vasya')");
mysql_close($connect);
?>

        ,         
 " vanya!"         . 
    SELECT:

<?php
$connect=mysql_connect("localhost","root","") or die ("<h3>Fatal Error</h3>     !");
mysql_select_db("new");
$w=mysql_query("SELECT login FROM user") or die ("  !");
print mysql_result($w,0);
mysql_close($connect);
?>

 mysql_result       : mysql_query   .

   ,          .

 ,    - 

not_Null -       (NULL), 
      
Primary_Key -     -  , 
     ;
auto_increment -            , 
            ;
Unique_Key -     ;
Multiple_Key - 
Blob -      
Unsigned -     
Zerofill -       \0
Binary -    
enum -         ( )
timestamp -           